Initial reports that a passenger tried to open a door during the flight were false. The FAA spokesman said it is "impossible to open a door at that altitude."

According to FlightAware.com, the plane was flying at 38,000 ft. at 10:05 p.m and dropped to 11,000 ft. in 12 minutes due to a loss in cabin pressure.

United Airlines released a statement saying 96 passengers and five crew members were on board the Boeing 737-700. All passengers were seated at the time the slide deployed and no one was hurt, the carrier says.

Passengers were taken off the plane about an hour after it landed, reports KWCH. United said another plane was to take the passengers to their final destinations and was expected to leave early Monday morning.

Mike Schroeder, who was flying back home to California, told KWCH he heard a hiss and a pop, then saw the slide starting to expand.

"We've been flying for years, I've never seen this before," Schroeder said. The crew also said they'd never experienced a similar incident.

A United Airlines maintenance crew was inspecting the plane to determine the cause.